metadata_core 0.0.1

Core interfaces and models for MetaVision.

metadata_core

Core interfaces and models for MetaVision.

This package provides essential structural definitions and interfaces used across MetaVision, including media models and metadata extraction interfaces.

Features

• Media and metadata models
• Core interfaces for metadata extraction

Getting started

Add metadata_core to your pubspec.yaml:

dependencies:
  metadata_core: ^0.0.1

Usage

Import the package:

import 'package:metadata_core/metadata_core.dart';

Extracting EXIF Metadata

You can extract EXIF metadata from image bytes using the ExifMetadataExtractor:

import 'dart:io';
import 'package:metadata_core/metadata_core.dart';
import 'package:metadata_core/src/extractors/exif_extractor.dart';

void main() async {
  // Read image bytes
  final file = File('path/to/image.jpg');
  final bytes = await file.readAsBytes();

  // Extract EXIF data
  final result = await ExifMetadataExtractor.extractFromBytes('unique_file_id', bytes);

  // Access the extracted device data
  print('Device Brand: ${result.device?.brand}');
  print('Device Model: ${result.device?.model}');
  
  // Access location data
  if (result.location != null) {
    print('Latitude: ${result.location!.latitude}');
    print('Longitude: ${result.location!.longitude}');
  }
  
  // Access image-specific metadata
  if (result.imageMetadata != null) {
    print('Exposure Time: ${result.imageMetadata!.exposureTime}');
    print('F-Number: ${result.imageMetadata!.fNumber}');
    print('ISO: ${result.imageMetadata!.iso}');
  }
}

Models and Interfaces

The package also provides core models and interfaces such as MediaFile, MetadataResult, and IMetadataExtractor which can be implemented to create custom metadata extractors.

Additional information

For more information, visit the repository.